Yesterday I updated my PC system from Windows 8.1 to Windows 10. I cannot login my local SQL server 2012. But I can work normally remote SQL Server with Microsoft SQL Server Management Studio. The local server information is :
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)(Microsoft SQL Server, Error: 2)